Table of contents

Astechnova International Energy Conference (ASTECHNOVA) is an international conference that is annually organized by the Department of Nuclear Engineering and Engineering Physics, Universitas Gadjah Mada, Indonesia. This 6^th ASTECHNOVA was virtually held on 24-25 August 2021 as a part of the Joint Conference EPIC-ASTECHNOVA 2021. This conference provides an ideal platform for the researchers, academicians, engineers, politicians, economists, energy enthusiasts, energy planners, and energy analysts, to share the recent research and development in the energy science discipline from various perspectives. The topics covered in this conference can be generally categorized in five (5) areas, namely new and renewable energy, energy efficiency and conservation, nuclear technology, energy security, and urban infrastructure and utilities.

The joint conference was attended by approximately 500 participants from various universities and institution in Taiwan, Bangladesh, Germany, India, Japan, South Korea, Malaysia, Thailand, Canada, United States of America, Singapore, and Indonesia. The panel session of this conference includes one (1) keynote lecture and six (6) invited talks by the panel speakers from across the globe, including Japan, United States of America, United Arab Emirates, South Korea, and Indonesia. As for the parallel session, oral presentations were delivered by the authors who submit their researches. In total, ASTECHNOVA 2021 organizer accepted 48 paper submissions after reviewed by distinguished experts in the field. The reviewing process has considerably reduced the number of published papers, but it also has raised the proceedings' quality.

Finally, we would like to thank all the participants, authors, panel speakers, reviewers, panel session moderators, parallel session chairs, steering committee, organizing committee, technical coordinators, and all other supporting staff for their tremendous support during this conference.

Astechnova 2021 Editorial Team

List of Foreword from Rector of Universitas Gadjah Mada, Foreword from Acting Director for Non-Aligned Movement Centre for South-South Technical Cooperation (NAM CSSTC), List of Committees are available in this pdf.

All papers published in this volume of IOP Conference Series: Earth and Environmental Science have been peer reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.

• Type of peer review : Single-blind

• Describe criteria used by Reviewers when accepting/declining papers. Was there the opportunity to resubmit articles after revisions?

∘ The review was done by considering five (5) aspects :

1) Relevance with topics

2) Novelty and originality

3) Clarity

4) Systematic

5) Analysis techniques and deduction

∘ One reviewer gave points on each aspect between 1-4. Based on total points from those four aspects :

1) Definitely Accept : 16-20

2) Accept : 11-15

3) Possibly Accept : 7-10

4) Rejected : 5-6

∘ There was an opportunity to resubmit articles after revisions.

• Conference submission management system:

The paper is uploaded via EDAS (https://edas.info/)

• Number of submissions received : 70 papers

• Number of submissions sent for review : 60 papers

• Number of submissions accepted : 48 papers

• Acceptance Rate (Number of Submissions Accepted / Number of Submissions Received X 100) : 68.57

• Average number of reviews per paper : 2

• Total number of reviewers involved : 36

• Any additional info on review process (eg Plagiarism check system) :

∘ The similarity score was checked by the editors to find the plagiarism using https://www.turnitin.com/.

∘ The standard similarity score to be accepted is less than 15%.

• Contact person for queries (Full name, affiliation, institutional email address) :

Name : Ayodya Pradhipta Tenggara

Affiliation : Universitas Gadjah Mada

Email address : ayodya.p.t@ugm.ac.id

The poor stability of perovskite materials is a problem of concern in commercialization. In this study, we investigated the doping of magnesium cations (Mg²⁺) in PbI₂ to improve the stability and efficiency of perovskite solar cells. The doping effect of Mg²⁺ can increase the crystallization rate. The perovskite film fabricated structure consists of ITO/TiO₂/perovskite/CuO. The fabrication method used is a two-stage spin coating. The concentrations of MgAc₂ were used 0, 0.75, 1, and 1.25 mg ml⁻¹. The characterizations used are XRD (X-Ray Diffraction), UV-Vis, SEM-EDX. While the performance of solar cells is measured using a solar simulator. The XRD pattern shows that the sample has a crystal structure of MAPbI₃, PbI₂, and CuO phases. The MAPbI₃ lattice parameter increased with increasing Mg acetate concentration. The grain size of the perovskite layer is between 5 - 15 μm, with a thickness of about 30 μm. The efficiency of perovskite solar cells increases with the increasing concentration of MgAc₂.

The islands of Papua and Maluku are eastern Indonesia which consists of remote islands and villages. The Papua Islands consist of 3,749 islands divided into two provinces, namely Papua and West Papua, while the Maluku Islands are 1,735 islands into two provinces of Maluku and North Maluku, the number of inhabited islands in Papua and Maluku around 230 islands and around 100 newly electrified islands. The electrification ratio for Papua is 47.69%, West Papua is 89.94%, Maluku is 87.02% and North Maluku is 88.68%. The electrification ratio is still below the national average. Maluku Islands and Papua Indonesia has abundant renewable energy natural resources, namely hydro potential. The total hydro energy potential of Papua and Maluku is 808 MW. To overcome this shortage of electricity, it is necessary to develop a renewable energy generation system according to the potential of the area, namely hydro power. Energy generation technology that is environmentally friendly, efficient, effective, and reliable can be a solution for electrification in Papua and Maluku. Hydro power plants using vortex turbines, picohydro turbines and axial turbines for permanent magnet generators can be a solution to electrify areas or villages remote in Papua and Maluku.

Non-edible oilseed can be used in biodiesel preparation as a low-cost feedstock. However, it contains a high free fatty acid or a high acid value, which causes a problematic biodiesel reaction. The investigation of acid value reduction of Calophyllum inophyllum oilseed by in situ esterification using sulfuric acid-catalyzed methanol and isopropyl alcohol has been conducted. Calophyllum inophyllum oil was extracted by n-hexane in the Soxhlet apparatus to determine the oil content. In situ esterification using methanol-isopropyl alcohol and the sulfuric acid as a catalyst was carried out in a reflux three-neck rounded bottom flask batch process to decrease free fatty acid or acid value. Four independent reaction variables, including the ratio of mixture volume to seed weight, the ratio of methanol to mixture volume, catalyst percentage, and reaction time, were varied. The experiments utilized by the response surface methodology with central composite design configuration to obtain the optimum conditions. The oil content of Calophyllum inophyllum oilseed extraction was 57.94% and an acid value was 90.38 mg KOH/g. The maximum esterified oil yield of 91.00% and 3.81 mg KOH/g minimum acid value were achieved in the optimum reaction conditions.

This study focused on improving the energy conversion of hybrid solar panels and a wind turbine system. The improvement was produced by enhancing the system with a solar tracker and a wind guide. A microcontroller operated the single-axis solar tracker based on a solar elevation database at -6.91N, 107.61E. The wind guide was an Omni Directional Guide Vane (ODGV), designed to support the drag-type Savonius turbine. The ODGV's inside and outside diameters were 540 mm and 1000 mm, respectively. The wind guide had a 30° polar angle between fins and produced a torque of 0.128 Nm at a wind speed of 4 m/s. The solar tracker increased the system performance by 47% and the wind guide by 166%.

Eastern side of Indonesia has a group of scattered Islands and have a great distance from the main Island. Fossil fuels are the main option for meeting the needs of electrical energy in the outer Islands. But the availability of fossil fuels is very dependent on the weather and modes of transportation. In addition, fossil energy also causes emissions and environmental pollution, so efforts to diversify alternative energy by utilizing renewable energy are needed to meet energy needs. Ut Island, Maluku is one of the Islands which is not yet powered by utilities. In this paper, the HOMER software is used to determine the optimal hybrid power plant configuration from a techno-economic perspective by utilizing energy resources available on the Island. From the simulations that have been carried out wind speed has a significant influence on the optimal configuration of the PLH system. Load value affects the amount of NPC and COE. The greater the load is fulfilled, the higher the NPC. But contrary to NPC, COE value will decrease.

Sebira is a small island located at the northernmost of the Thousand Islands, Indonesia. The Electricity supply at the island uses an isolated network system for its territory. This study aims to model a system of electrical energy supply in Sebira Island. We explore literature studies related to the electricity supply system to support our model to be more representative. We then describe the system with a Causal Loop Diagram and a Stock Flow Diagram. The current electricity supply comes from solar power plants 400 kWp and three units diesel power plants with capacities of 125 kVA (2 units) and 250 kVA (1 unit). In this model, we consider the variables of population growth, initial investment, electricity shortages, fuel costs, profits, and margins. Furthermore, we create two scenarios in the simulation, with and without additional wave energy. The results show that in a sufficiently long period, the second scenario (with extra wave energy) is more profitable for the electricity supply in Sebira Island; however, it requires more initial investment than the first scenario.

This paper will present a techno-economic potential and feasibility analysis in the planning of renewable hydropower energy from Sepaku Semoi Dam in Penajam Paser Utara (PPU) Regency. The dam was planned to be built to support the water needs of Indonesia's prospective capital. The analysis was done based on the last twenty years' rainfall intensity data history from Sepaku rain station and Sepinggan rain station and digital elevation model (DEM) from DEMNAS with support of the river basin agency of Kalimantan Timur. The result of dependable discharge calculation of Sepaku Semoi river using FJ Mock Method is 2.45 m/s². And the head of the hydropower power plant is 15.85 meters. The total potential electricity generated from hydropower reached 2,593,140 kWh/year. The assessment of feasibility indicators in this research took into account the technology and economic aspects. The technology aspects help evaluate the technical planning of installations that are possible to build in the dam. The economic aspect of feasibility evaluates the net present value (NPV), internal rate of return (IRR), and the payback period of renewable energy installation. This analysis aimed to get a comprehensive insight from the potential hydropower energy that exists at the research locations and conduct a feasibility study based on techno-economic analysis to develop renewable energy. The results showed that 15.85 meters had the most significant potential of hydropower by generating 290 kW continuous power with a feed-in tariff of 0.054 USD/kWh. The electricity was feasible to offer to the government electrical company. Moreover, this project had a payback period of 8 years, and NPV of 64,005 USD, and an IRR Project of 11.86%.

In this paper, a new approach for supplying water to shrimp production ponds in Purworejo, Indonesia, is proposed. The paper covers the design of a solar-powered DC water pump system (SWPS), system performance analysis, and economic analysis by comparing it with the existing fossil-fuel-powered pumps. The mathematical approach for the designing process is shown and Lorents Compass alternative tool is introduced. By taking into consideration the daily water demand of 50 m³/day, the annual-averaged local solar irradiation of 4.7 kWh/m² per day, and the available components in the market, an SWPS in Purworejo would comprise a 1200 Wp PV panel and a 600 W DC pump submerged in a borehole in the seashore. The SWPS would be able to meet the daily water demand with small seasonal variations. The financial analysis shows high feasibility to install SWPS in Purworejo with a 1,6 years simple payback period, which is very short. The SWPS would provide more than 20 years of free energy for the farmers to draw seawater to the pond each day when the sun shines. It can provide not only environmental and social benefits but also significant economic advantages, both at the farm and the national levels.

Salt production farmers in Patutrejo Village, Purworejo Regency, spend nearly Rp. 10 million per year for diesel water pump operational costs. The cost of fuel is the heaviest financial burden for the farmers. Not only is it expensive, but fuel scarcity is also a serious issue causing the salt production capacity target cannot be assured, and the increasing demand for salt cannot be met. This study proposes using a solar water pump system (SWPS) as an alternative solution for the farmers to ensure and increase salt production. For a group of farmers in Patutrejo who require pumping around 35 m³ of seawater each day, a photovoltaic (PV) panel of 900 Wp and a DC pump of 700 Watt can perform the task sufficiently. The total capital cost of the SWPS is Rp. 90 million, with a simple payback period (SPP) of 9.5 years. The SPP would be shorter if future fuel price increases were taken into account. With a lifetime of up to 25 years, SWPS promises a long-term, practical, reliable, and sustainable solution for salt farmers in Patutrejo.

This study proposes a sustainable solar-powered irrigation system (SPIS) for a 75-hectares rice farm in Krandegan Village, Purworejo Regency, Indonesia. The existing water pumping system uses diesel engines which cost around Rp. 200 million per year that cannot be provided by the farmers. The SPIS was designed based on water requirements calculated according to the Food and Agriculture Organization (FAO). The technical design of SPIS used Lorentz Compass considering local solar energy sources and the availability of SPIS components in the local markets. The entire farm in Krandegan requires 11 SPISs with a total capacity of the solar panel of 20.8 kWp. Also, the SPISs use 11 centrifugal DC pumps; 10 surface and 1 submersible type. The SPIS in Krandegan would require a total cost of Rp. 1.29 billion. Without the financial support of the capital costs from other parties, the simple payback time (SPT) would be around 6.5 years, which is good for a solar photovoltaic (PV) project. SPIS is not only a viable solution to replace diesel engines in supplying water to the rice farm in Krandegan, but is also in line with the seventh target of Indonesia's Village sustainable development goals (SDGs).

Solar energy is a potential renewable source in Indonesia, especially for the drying process. The process needs a drying cabinet as a support component to store the drying product. A high-quality drying cabinet to store heat for a long time is needed. This research aims to compare the thermal performance of the drying cabinet without PCM (phase change material) and SiO₂ materials or DC I (drying cabinet I) with the drying cabinet that uses PCM and SiO₂ materials or DC II (drying cabinet II). The research was carried out by experimental and simulation to investigate thermal performance and fluid flow characteristics. The experiment was carried out inside the laboratory to set uniform initial parameters and the simulation using computational fluid dynamics software. The drying cabinet was modeled in 3D. The experiment result showed DC II had a higher air temperature and lowered relative air humidity for two hours than DC I. The simulation result showed air temperature differences and backflow in the air streamline in the DC II.

Microbial Fuel Cells (MFCs) are bioelectrochemical devices that can directly transform the chemical energy from organic matter into electrical energy using microbial metabolic activity, so microbes play an essential role. This study explores some organic substrate alternative cost-effective for Staphylococcus saprophyticus ICBB 9554 as an exoelectrogen for electricity production in MFCs. The organic substrates that were chosen were sugar, molasses, and palm sugar. The best performance in electricity production was in molasses which showed output voltage, electrical current, and power density of 789 mV, 0.48 mA, and 68 mW/m², respectively. The COD removal, Coulombic efficiency, and bacterial density in molasses also the highest that was about 68.18 ± 0.00%, 45.80 ± 2.17%, and 1.09×108 cfu/ml, respectively. Molasses is a potentially cost-effective alternative organic substrate for MFCs inoculated by Staphylococcus saprophyticus ICBB 9554.

Micro-hydropower plants have become one of the alternative solutions to meet the electricity needs of people in remote villages that the public electricity company has not reached. However, the performance of a micro-hydro system has to be continuously developed. This research aims to improve the performance of a micro-hydro system by examining the effect of the slope of the penstock on the increase in electrical power. The penstock slope is varied with diverse angles, namely θ = 50 °, 60 °, 70 °, 80 °, and 90 °. Five simulations of water flow in the penstock for five slope angles were constructed using the open-source CFD software, i.e., OpenFOAM. We calculate the electric power for the five simulations aforementioned. The calculation results show that the variation of the penstock slope can affect the increase of the electric power of a micro-hydro system. The highest electric power occurs at a maximum slope, θ = 90 °.

The problem of global warming is a problem facing the world community. Since the Industrial Revolution's birth, the use of energy from fuel oil (FF) has surged, and this causes an increase in Greenhouse Gases (GHGs) resulting from burning fuel. This GHG is the cause of the rise in the earth's temperature, which is estimated to one day, the earth is not comfortable and even no longer habitable. The solution to the problem is reducing GHGs that can be done by saving fuel use, which is replaced with renewable energy sources (REs). RE sources are obtained from the Solar Power Plant (SPP), Wind Energy Power Plant (WEPP), Ocean Wave and Current Power Plant (OWPP and OCPP), Nuclear Power Plant (NPP), Biodiversification Power Plant (BPP), Hybrid Power Plant. Besides, REs can also increase the overall electrification in Indonesia, such as in East Nusa Tenggara. However, the electrification rate is still low in quality. According to the Republic of Indonesia Government Regulation 2014, the National Energy Policy mandates that energy mix from REs in 2025 is expected to reach 23%. This paper presents a literature review on new and renewable energy that can be considered early in their use.

There have been many efforts to reduce the use of fossil fuels and reduce carbon dioxide emissions by using renewable energy (solar energy, wind energy, water energy, and energy obtained from biomass) as a substitute for fossil fuels. As one of the largest CPO producers globally, Indonesia produces 4 kilograms of dry biomass for every 1 kilogram of oil palm produced. The biomass conversion process into synthetic gas (syngas) can be carried out using the pyrolysis process. The syngas can be used as an alternative fuel for an internal combustion engine. This study aims to simulate the pyrolysis process to obtain syngas' characteristics made from oil palm empty bunches (EFBs) and palm fiber. Around 4 kg EFB and 2 kg of fiber are used as pyrolysis raw materials. The Aspen Plus simulation was used to design and analyzed the pyrolysis flow processes. The results showed that the hot syngas produced at a working temperature of 450°C to 650°C was 1.475 kg/hr to 1.587 kg/hr. The cold syngas produced is 0.969 kg/hr to 1.407 kg/hr. The heating value of hot syngas is 10,348 kJ/kg to 14,213.55 kJ/kg, and cold syngas is 15,751.51 kJ/kg to 16,022.7 kJ/kg. Change in syngas composition between hot and cold syngas is due to the condensation process. The minimum condenser area required to produce cold syngas for 6 kg and 500 kg biomass pyrolysis raw material are 25.5 m² and 632.2 m², respectively.

The development of renewable energy is increasing nowadays. Besides, the development of energy conversion systems that can work at high efficiency also increases along with the decreasing availability of fossil energy. The fuel cell is an electrochemical device that converts chemical reaction energy directly into direct current electrical energy. The use of fuel cells as power generating in housing has also increased rapidly, especially in developed countries. This study aims to develop a model and simulation for the Polymer Exchange Membrane Fuel Cell (PEMFC) system with a working temperature of 165 °C) using Aspen Plus simulation. In this analysis, the model and simulation developed are used to predict the amount of fuel needed when used in housing as an electricity generator and obtain a monetary value for the monthly fuel procurement. The PEMFC system is designed to generate power up to 0.60 kW by consuming hydrogen fuel with a current density of 0.02 A/cm². The hydrogen consumed by the PEMFC system is around 0.030 kg/hour, with a monthly cost of hydrogen consumption by the system is Rp. 2,052,000. Meanwhile, the monthly electricity from the national grid (PLN) bill costs around Rp. 569,261 (in the year 2019). In comparing the energy bill, at the moment, the fuel cost for PEMFC as a power generation system is much more expensive than PLN's electricity consumption costs due to the high hydrogen fuel cost.

Green Diesel (diesel-like hydrocarbon) can be produced from biomass resources that contain fatty acids, such as palm fruit, palm kernel, and soybean, through deoxygenation reaction. In this study, the catalytic activity of cobalt catalyst supported on activated biochar in deoxygenation of fatty acid (stearic acid) is investigated. Stearic acid is used as a model compound of vegetable oil. The obtained results show cobalt supported on activated biochar exhibited higher catalytic activity compared to cobalt supported on unactivated biochar.

The purpose of this study is to design a Photovoltaics (PV) stand-alone system for a residential load in Bunaken Island using HOMER (Hybrid Optimization of Multiple Energy Resources). Bunaken Island, the case study location, is a popular tourist spot in North Sulawesi, Indonesia. This island is facing the issue of limited access to electrical energy from the grid. The design and techno-economic analysis in Bunaken island leveraged HOMER software. This software was developed by National Renewable Energy Laboratory (NREL). Furthermore, the results suggested that the techno-economical PV stand-alone system in Bunaken Island could be developed as alternative energy to support electricity as energy security issued for Indonesia.

The effect of a synergetic mixture of large and small activated carbon composite particles on the performance of organic electrolyte-based EDLCs was examined in this work. Different surface areas, pore volumes, particle size distributions, and concentrations of surface functional groups were observed in bi-modal particle sizes of activated carbon composites. Using galvanostatic cycling, the cell capacitance of an activated carbon composite rose with an increase in the fraction of big particles (C8) over a wide range of rates. Due to their moderate specific surface areas, a relatively low fraction of smaller particle size, low concentration of oxygen functional groups, low contact resistance, and high ionic conductivity, the 0.25C4+0.75C8 carbon electrode composite has a high specific capacitance, high retention of high rate discharge, and long cycle life when compared to other composites and single carbon electrodes (C4, C8, and C12). The leakage current and gas evolution may be suppressed to an operating voltage of 3.0 V with an appropriate fraction of large and small particle composition on the carbon electrode, boosting the carbon cells' reliability and stability.

Fuel loading pattern optimization is a complex problem because there are so many possibilities for combinatorial solutions, and it will take time to try it one by one. Therefore, the Polar Bear Optimization Algorithm was applied to find an optimum PWR loading pattern based on BEAVRS. The desired new fuel loading pattern is the one that has the minimum Power Peaking Factor (PPF) value without compromising the operating time. Operating time is proportional to the multiplication factor (k_eff). These parameters are usually contradictive with each other and will make it hard to find the optimum solution. The reactor was modelled with the Standard Reactor Analysis Code (SRAC) 2006. Fuel pins and fuel assemblies are modelled with the PIJ module for cell calculations. One-fourth symmetry was used with the CITATION X-Y module for core calculations. The optimization was done with 200 populations and 50 iterations. The PPF value for the selected solution should never exceed 2.0 in every burn-up step. Out of 28 solutions, the best optimal fuel loading pattern had a maximum value PPF of 1.458 and a k_eff of 0.916 at day 760 of calculated time (corresponding to a cycle length of 479 days). Therefore, the maximum PPF value was 27.1% lower than the safety factor, and the same operating time as the standard loading pattern has been achieved.

The mesoporous gamma-alumina is a good material for metal adsorption. Its textural properties are excellent, mainly for molybdenum-99 radioisotopes adsorption as part of ⁹⁹Mo/^99mTc generator in nuclear medicine. In this work, we have prepared mesoporous gamma-alumina by sol-gel treatment in the presence of glucose as a soft template. The molar ratio of reactant (water: aluminium isopropoxide(AIP)) was applied in the high and low ratios (150:1 and 25:1). The resulted mesoporous gamma-alumina was investigated using characterization analysis of X-ray diffraction, Nitrogen adsorption-desorption, and FTIR. The results indicate that the mesoporous gamma-alumina in the high molar ratio of water to AIP had a higher surface area and better crystallinity than the low molar ratio of reactants. Furthermore, in the Mo adsorption test, the mesoporous gamma-alumina with the high molar ratio posed a higher Mo adsorption capacity up to 55.69 mg Mo g⁻¹ adsorbent. In the future, the molar ratio of reactants should be tuned in the range of around 150:1 to obtain the optimal Mo adsorption capacities of the resulted mesoporous gamma-alumina using the glucose template.

With moving fuel, the pebble bed reactor (PBR) provides flexibility in the fuel management process due to the capability of online fuel refueling. This capability allows the reactor to operate at any given time without the need to shut down for refueling. The complexity of the depletion and burnup analysis requires the problem to be solved with sophisticated and robust computer codes that can handle the fuel shuffling. Since the fuel refueling is conducted from top to bottom, the shuffling and fuel movement in the axial direction should be modeled with acceptable accuracy. The purpose of the simulation is to obtain the equilibrium or even a critical condition of the reactor. The model used is based on the simplified pebble bed reactor with 200 MWt of thermal reactor power, 3 meters of core diameter, and 10 meters of core height. To model the axial shuffling on the reactor, a neutronic computer code called PRAKTIK 3D-HTR is used. The code utilizes the diffusion method in a three-dimensional cylindrical geometry to model the neutronic phenomena in the reactor. Moreover, PRAKTIK 3D-HTR is equipped with the burnup calculation and depletion analysis to be able to handle fuel movement. Finally, the axial shuffling mechanism is implemented using the once-through-then-out (OTTO) method. Implementing this method to the reactor, an equilibrium condition can be obtained. In this condition, the reactor condition in terms of criticality and flux shape is relatively constant. The critical condition can also be searched using PRAKTIK 3D-HTR to obtain the condition when the multiplication factor is equal to unity. The criticality search is conducted by changing the fuel movement speed. If the multiplication factor is less than 1, then the shuffling speed needs to be increased. Otherwise, if it is more than 1, the shuffling speed will be decreased.

Site survey in the potential site of the Nuclear Power Plant (NPP) construction is an essential preliminary activity. Site survey has a crucial role in successful NPP construction. Several factors are contributing to a successful site evaluation. One of them is the Site Evaluation Management System (SEMS). Indonesia National Nuclear Regulatory Body (BAPETEN) had stipulated Head of BAPETEN Decree No. 4 the Year 2010, about Management System for Activities and Facilities. A site survey activity needs to adhere to the requirements in the regulation above, consisting of the management system, management's responsibility, resources management, implementation process, monitoring, measurement, evaluation, and correction. The implementation of SEMS is conducted with the methods of a plan, do, check, and action and applied to these site survey phases: survey planning, survey implementation, survey audit, and survey review. It found that the SEMS implementation with the preliminary risk assessment significantly improves the safety of the site survey activity. The risk assessment result is categorized as follows: acceptable risk, tolerable risk, intolerable risk, and unacceptable risk. The risk assessment was conducted by following site survey activities: seismic, volcanic, meteorologic, hydrologic, geotechnical and foundation, human-induced events, and population distribution and density. It found that the implementation of SEMS with preliminary risk assessments supports the Indonesia energy security, which includes 4A: Availability (the availability of the energy kind), Accessibility (the accessibility to utilize the energy), Affordability, and Acceptability (public's acceptance to the energy utilization). Site survey activities that meet the Availability criteria are from these aspects: seismic, volcanic, meteorologic, hydrologic, geotechnical, and foundation; while the site survey activities that meet the acceptability criteria are from these aspects: human-induced events, and population distribution and density. The implementation of SEMS has a better impact on the site survey activity when a series of risk assessments is conducted beforehand. It also found that the implementation of SEMS with preliminary risk assessments fulfills the 4A of Indonesia Energy Security: availability, accessibility, affordability, acceptability.

Pebble bed reactor with a once-through-then-out fuelling scheme has the advantage of simplifying the refueling system. However, the core upper-level power density is relatively higher than the bottom, producing an asymmetric core axial power distribution. Several burnable poison (BP) configurations are used to flatten the peak power density and improve power distribution while suppressing the excess core reactivity at the beginning of the burnup cycle. This study uses HTR-PM, China's pebble bed reactor core, to simulate several burnable poison (BP) configurations. Serpent 2 coupled with Octave and a discrete element method simulation is used to model and simulate the pebble bed reactor core. It is found that erbium needs a large volumetric fraction in either QUADRISO or distributed BP to perform well. On the other hand, gadolinium and boron need a smaller volumetric fraction but perform worse in radial power distribution criteria in the fuel sphere. This study aims to verify the effect of BP added fuel pebbles on an OTTO refueling scheme HTR-PM core axial power distribution and excess reactivity.

Near-surface disposal (NSD) has been applied in several countries to dispose of low-level radioactive waste. The demo plant of this disposal type is planned to be constructed in Serpong Nuclear Area, Banten. An assessment of radiation exposure is necessary to ensure the safety requirement of the facility in order to support this program. This study aims to estimate radionuclide migration from the proposed NSD demo facility to the environment and the corresponding total human dose using AMBER mathematical modeling. The representative radionuclide,¹³⁷Cs, was selected because of its high mobility in the environment and the relatively long half-life in the low-level waste inventory. The scenario considered in the modeling was the normal release to the environment through groundwater. Parameters such as initial radionuclide concentration, soil physical parameters of the study site, and disposal design were entered into AMBER software to be calculated using mathematical formulas. The results show that the radionuclide concentration value in the environment is below the safe limit recommended by the Environmental Supervisory Agency. Likewise, the maximum dose received by the community around the facility is 7.40×10^-11 mSv/y, 550 years after the post-closure of the facility, which is also below the regulatory limit of 1 mSv/y for the public.

As a beta and positron emitter, copper-64 (Cu-64) has been coined a theranostic agent in nuclear medicine. Copper-64 is generally produced by bombarding a nickel-64 target with a proton beam via ⁶⁴Ni(p,n)⁶⁴Cu nuclear reaction. In this work, secondary fast neutrons are proposed to produce Cu-64 radioisotope via ⁶⁴Zn(n,p)⁶⁴Cu nuclear reaction. The secondary fast neutrons were produced by a 10 MeV proton-irradiated primary titanium (Ti) target simulated using the PHITS 3.16 code. In the simulation, the Ti target thickness was varied from 0.01 to 0.1 cm to obtain the optimum secondary fast neutron flux, which was calculated in the rear, radial, and front directions. The Cu-64 radioactivity yield was then computed using the TENDL 2019 nuclear cross-section data. Also, the expected radioactive impurities during Cu-64 production were predicted. The simulation results indicated that the total fast neutron flux resulted from the 10-MeV proton bombarded Be target was 1.70x10¹² n/cm²s. The maximum integrated Cu-64 radioactivity yield was 2.33 MBq/µAh when 0.03 cm thick Ti target was shot with 10-MeV protons. The most significant impurities predicted during the bombardment were radioactive isotopes e.g., Co-61, and Zn-65, with the total radioactivity yield estimated to be 0.28 Bq/µAh.

In order to support the verification and validation of computational methods and codes for the safety assessment of pebble bed High-Temperature Gas-cooled Reactors (HTGRs), the calculation of first criticality and full power initial core of the high-temperature pebble bed reactor 10 MWt (HTR-10) has been defined as one of the problems specified for both code-to-code and code-to-experiment benchmarking with a focus on neutronics. HTR-10 Experimental facility serves as the source of information for the currently designed high-temperature gas-cooled nuclear reactor. It is also desired to verify the existing codes against the data obtained in the facility. In HTR-10, the core is filled with thousands of graphite and fuel pebbles. Fuel pebbles in the reactor consist of TRISO particles, which are embedded in the graphite matrix stochastically. The reactor core is also stochastically filled with pebbles. These two stochastic geometries comprise the so-called double heterogeneity of this type of reactor. In this paper, the first criticality and the power distribution in full power initial core calculations of HTR-10 are used to demonstrate treatment of this double heterogeneity using TORT-TD and Serpent for cross-section generation. HTR-10 has unique characteristics in terms of the randomness in geometry, as in all pebble bed reactors. In this technique, the core structure is modeled by TORT-TD, and Serpent is used to provide the cross-section in a double heterogeneity approach. Results obtained by TORT-TD calculations are compared with available data. It is observed that TORT-TD calculation yield sufficiently accurate results in terms of initial criticality and power distribution in full power initial core of the HTR-10 reactor.

Molybdenum-99 (⁹⁹Mo) is a parent radioisotope of Technetium-99m (^99mTc) widely used in nuclear diagnostics. The production of this radioisotope by PT. INUKI generated radioactive fission waste (RFW) that theoretically contains²³⁹Pu and²³⁵U, posing a nuclear proliferation risk. This paper discusses the determination of radionuclides inventory in the RFW and the proposed strategy for its management. The radionuclides inventory in the RFW was calculated using ORIGEN 2.1 code. The input parameters were obtained from one batch of ⁹⁹Mo production using high enriched uranium in PT. INUKI. The result showed that the RFW contained activation products, actinides, and fission products, including²³⁹Pu and²³⁵U. This result was then used for consideration of the management of the RFW. The concentration of ²³⁵U was reduced by a down-blending method. The proposed strategy to further manage the down-blended RFW was converting it to U₃O₈ solid form, placed in a canister, and eventually stored in the interim storage for high-level waste located in The Radioactive Waste Technology Center.

Since its discovery in 1946, Proton therapy has continued to overgrow from the number of units installed in various countries and the technology used. This paper aims to provide an overview of the development of proton therapy facilities to date based on a literature review. The results are discussed in several aspects, including its distribution across the globe, beam delivery techniques, dose verification, room layout, and shielding design considerations.

The reactor tank liner is one of the most crucial safety barriers in a research reactor as it retains the radioactive material released from the fuel during the accident condition. It also contains the primary coolant for fission heat removal. The integrity of the tank liner determines the service life of the research reactor. So far, the remaining life estimation of pressure vessels in nuclear power plants is more widely applied and established than that of the research reactor tank liner. Therefore, a study on the remaining life estimation method of the research reactor tank liner is needed to ensure the research reactor operation safety. This paper aims to preliminarily study several methods applied to estimate the remaining life of a research reactor tank liner. The preliminary study consists of a qualitative assessment and a quantitative assessment. The qualitative assessment aims to propose several techniques or methods applied in estimating the remaining life of the reactor tank liner. The quantitative assessment applies one of the remaining life estimation methods discussed in the previous assessment. Generally, the remaining life of the research reactor tank liner can be estimated using the theoretical method and the experimental method. The theoretical methods are applied by calculating the neutron fluence received by the tank liner or by analyzing the fracture mechanics using numerical modeling if the cracks or other defects exist. The calculation of atom displacement number (dpa), as a standard measure of the neutron-induced radiation damage of the materials, can support the neutron fluence calculation. The experimental method is conducted by measuring several parameters of the tank liner material, such as the corrosion rate or the mechanical properties. In the quantitative assessment, the remaining life estimation of the Kartini Reactor tank liner was performed by neutron fluence calculation method using MCNP6 computer code. The result shows that the maximum neutron fluence received by the tank wall is 2.950E+17 n/cm² for 40 years operating period. By comparing the cumulative neutron fluence received for 40 years to the thermal neutron fluence limit value of 1.18E+23 n/cm², the Kartini Reactor tank liner can still be used for the next 1.6E+07 operation years. The result of the quantitative assessment implicitly shows that the remaining life estimation of the tank liner needs to: 1) consider all defects experienced by the tank liner and all factors (e.g., thermal, radiation, chemical, cyclic loading) which affect the tank liner material condition, and 2) perform the combination of theoretical and experimental methods. For an open-pool type reactor, corrosion monitoring and corrosion rate measurement are essential to perform the remaining life assessment of the tank liner.

Electricity consumption in Padang Lawas Regency has increased every year, namely 59,962,000 kWh in 2018, and reached 74,060320,5 kWh in 2020. This increase is in line with the population growth rate so that it also has an impact on land availability. Forecasting electricity consumption absolutely must be done because it greatly affects the distribution and availability of electrical energy. There are three problems related to electrical energy resources. First, the availability of electricity will decrease as demand increases. The second is the increase in population which has an impact on improving the quality of life of the community and the availability of electricity. Third, the increase in land conversion is increasingly massive, causing population density and energy needs in the region to increase. For this reason, it is necessary to project the need for electrical energy for the population and land conversion in Padang Lawas Regency in 2021-2050. The objectives of this study can be used as a basis and choice for policy and strategy making in regional development planning by the Padang Lawas Regional Government. This is done so that the problem of electricity availability can be resolved. This research was conducted using the PowerSim Studio 10 application by simulating a dynamic system model involving several variables that influence each other. The results showed that population variables affect land requirements and total energy consumption. Analysis of electricity availability in Padang Lawas Regency until 2050 will experience an increase in electricity consumption accompanied by an increase in population and land conversion. Based on the results of the simulation scenario, the availability of electricity in Padang Lawas Regency can meet the total electricity consumption needs until 2050, either with or without intervention.

Indonesia's government has targeted 24% of natural gas in the national energy mix by 2050. However, one of the main problems in Indonesia's natural gas development is the price mechanism. Unlike many countries, Indonesia's natural gas market, including its pricing, is still heavily regulated and subsidized by the government. The low natural gas price has damaged the investment climate and slowed the natural gas development in the country. An overview of the global natural gas market evolution, as well as a comprehensive analysis of natural gas market transformation from China and Malaysia, were presented in this paper. The wider gap between supply and demand of natural gas and the increase of the LNG market in Asia have pushed China and Malaysia to reform their natural gas market into a liberalized system. This provides an insight to examine Indonesia's natural gas pricing policies. The highly regulated market often fails to provide the actual cost of supply, leads to underinvestment, and causes a natural gas shortage in a country. Natural gas pricing policy transformation is mandatory to ensure supply stability and keep up with the global natural gas market dynamic. The transformation should be implemented gradually to give natural gas producers and end-users enough time to adjust to the regulations. In the end, gas-to-gas competition should be set as the long-term goal to allow retail competition in Indonesia's natural gas market.

The interest in small modular reactors worldwide has been increasing due to flexibility in the power generation for more comprehensive users and applications. Small Modular Reactors or SMRs can be the primary choice for Indonesia provided with the geographical condition, which consists of many islands and is more flexible in construction compared to the conventional nuclear power plant. The main objective of this paper is to provide an overview projection of demand and energy mix of electrical in Indonesia 2030 with SMRs NPP in the energy mix referring to RUPTL or General Plan of Electricity Supply Indonesia. Using the end-use model, which is total electricity consumption for each electricity sector, it can be calculated how much electricity demand is from these sectors. The scenario uses RUPTL, roadmap from Energy and Mineral Resources Ministry references, and policy of no coal power plant added from 2020 onwards. The results show in 2030, Indonesia needs 577,016.2 GWh of electricity, where the household and industry sectors have the highest electricity needs, which is 44% for the household sector and 31% for the industry. The transformation projection in PLTGU or Combined Cycle Power Plants scenario also shows that without replacing the power plant, renewable along without SMRs only had ±7.49% of the total capacity mix, and the second scenario with SMRs shows that renewable energy share had 16.07%.

World is witnessing a trend of countries adopting renewable energy sources viz.a.viz. Fossil fuels dominated energy sources. International Energy Agency believes that by 2025 energy produced from Renewable energy sources will most likely surpass electricity generated by coal. India being one of the largest producer and consumer of electricity in the world is already one of the largest producers of energy from renewable sources in the world with 38%+ of India's total installed capacity from renewable energy sources. In this study we analyze and review the role that Renewable Energy is going to play in India's Energy basket. With growing dependence on non-fossil fuels, it's imperative for industry participants, policy makers, governments and researchers to decipher what is the role that is going to be played by energy produced from renewable energy sources in India's energy basket from a strategic as well as policy making perspective.

As an archipelago country located around the equator line, Indonesia has a broad ambient temperature range of varying atmospheric conditions. This issue should be concerned with applying ISO 16358-1 to calculate Seasonal Energy Efficient Ratio (SEER) on cooling, or so-called the Cooling Seasonal Performance Factor (CSPF). The ISO 16358-1 recommend a set of bin temperature which can be used as the basis for calculating the CSPF. The research objectives are to compare the local ambient temperature of four cities in Indonesia (Jakarta, Bandung, Pontianak, and Palembang) with the ISO bin temperature. The normal distribution graph of temperature for every four cities in Indonesia shows a remarkable difference from the ISO bin temperature. Jakarta's most occurring temperature range is 25 – 30 °C, Bandung is 21 – 23 °C, Pontianak is 24 – 26 °C, and Palembang is 24 – 26 °C, annually. Those numbers were compared to the ISO, which has the most occurring temperature range around 24 - 28 °C. The result on CSPF calculation of AC unit sample in the range of 4,000 – 17,000 Btu/hr (both non-inverter and inverter) using Indonesia local bin temperature compared with the ISO bin temperature has an average range of 5.10%. It was concluded that Indonesia's local ambient temperature affects the CSPF value, especially on the AC inverter unit. On the other hand, the relatively small difference value of CSPF has an advantage in applying the ISO bin temperature for future Indonesia's energy conservation policy. It could lead to harmonizing with other South-East Asian (ASEAN) countries specifically, and another country also applying the ISO 16358-1, in general.

In the industrial era 4.0 as it is today, along with the increasing need for electrical energy, energy efficiency is an essential factor in achieving energy production cost efficiency. Efficiency will be achieved if electricity production can be adjusted to the customer's electrical load. However, adjusting the electricity production poses a challenge, namely the difficulty of predicting the daily electricity load of customers. There are many factors that affect the electric load. One of the main factors is the weather. Therefore, this study focuses on the correlation of weather parameters on load demand. The weather parameters consist of temperature, rainfall, solar radiation, and wind speed. Case studies were conducted in Bali Island and Central Java Province. This paper looked for correlations between weather parameters with the load demand, especially in the island of Bali and Central Java Province.

Lithium batteries have been identified as one of the most promising energy conversion and storage devices because of their high energy density, safety, and long cycling life. Lithium-polymer batteries have been widely used in various applications ranging from electric vehicles to mobile devices. The purpose of this study was to determine the best type of lithium-polymer and VRLA batteries in the review of the balance of battery life timeout comparison for a predetermined load. Each battery has a different actual balance and theoretical comparison value. The best balance value is close to 1. The best balance comparison after the experiment was a LiPo battery type with a balance value of 0.77 R158F076A7 BMS 3s, then VRLA with a balance of 0.67, and the smallest balance is a LiPo GSE 18650 battery with a balance of 0.25. For both types of batteries with the same input parameters provided, the terminal voltage, current, and characteristics output of Lithium-polymer Li-Po GSE 18650. Batteries were found to be better than a lead-acid with a timeout of use that is 51.64 minutes.

In improving performance and reducing exhaust emissions in combustion engines, the addition of ozone to the air supplied in the combustion chamber was studied. In this research, ozone can be produced using plasma technology (plasma-ozone) which is a simple and eco-friendly technology. Plasma-ozone was generated using the Dielectric Barrier Discharge (DBD) method. Air is passed in plasma-ozone reactors at different voltages with an ozone variation of 3 mg, 12 mg, 15 mg and 18 mg is obtained. Ozone concentration was detected using an Ozone meter O₃ Air Quality Detector and OPA-100 was used to determine exhaust emissions. The result showed that the addition of ozone to the air supply has no significant effect on brake power but is able to increase specific fuel consumption, increase cylinder pressure, shorten combustion processes, and reduce heat release values. The addition of ozone decreases the opacity of exhaust emissions in TV-1 diesel engines become more eco-friendly.

The consumption of fossil fuels raises major issues, such as energy availability and environmental preservation. In order to minimize these issues, it is important to propose alternative fuel. Alternative fuel to be proposed should be easy to apply current type of enginethat do not require engine modification and environmentally friendly. This study aims to determine the effect of addition of methanol as a non-fossil fuel mixture into RON 88 gasoline. The ratio of mixture is 80% of RON 88 gasoline and 20% of methanol. We conducted the experiment to determine the mixture effect on fuel properties, engine performance, engine vibration, engine noise, and exhaust emissions. The engine simulation utilized the TV-1 engine (Kirloskar Oil Engines Ltd.). The results show that the engine performance of fuel mixed with methanol tends to be better even though the fuel consumption is higher, the highest specific fuel consumption in the methanol mixture is 2.9 kg/kwh while the specific fuel consumption for gasoline without a methanol mixture is 2.64 kg/kwh. The largest engine vibration occurred in the measurement of the vertical radial direction of 36 m/s2 and 34 m/s2 for with methanol and without the addition of methanol, at 1200 rpm to 1600 rpm respectively. Engine noise is higher for fuel mixed with methanol with the largest value of 86.4 dB compared to 85.7 dB for pure gasoline. Lower emission levels for fuel blended with methanol, where the highest HC emission for pure gasoline is 32 ppm while fuel mixed with methanol is 17 ppm.

The use of natural light as a source of lighting in buildings is an option in energy saving. One of the efforts that has been made is the installation of a light shelf. The light shelf installed in the UGM Vocational School Economics and Business Diploma (DEB SV) building is not fully working optimally. As many as 83% of the light shelf in lecture rooms is covered by curtains because it is considered to produce excess light (glare). This results in a greater consumption of lighting electricity. This study was conducted to analyze and evaluate the effect of the reflectance value (color) attached to the internal walls, internal roof, external light shelf, and internal light shelf on the indicator of illumination levels Useful Daylight Illuminance (UDI). Furthermore, this study aims to determine the optimum reflectance value (color) parameter. The research was conducted with a simulation method using RadianceIES in the IESVE 2021 software. The first simulation results show the value of reflectance (color) installed (base case) on the internal wall, internal roof, external light shelf, and internal light shelf in one of the lecture rooms of the DEB SV UGM building resulting in a very large value of the UDI_>2000lux indicator, which is 84,9% (not according to the criteria). The results of the second simulation provide two variations of the optimum reflectance (color) parameters in the independent variable. The first variation is the internal walls, internal roof, external light shelf, and internal light shelf, each of which has a reflectance value (color) of 90,67% (beige), 100% (white), 90,67% (beige), and 100% (white). The second variation is the internal walls, internal roof, exte rnal light shelf, and internal light shelf, each of which has a reflectance value (color) of 90,67% (beige), 100% (white), 90,67% (beige), and 90,67% (beige).

Gas Turbine Compressors are used by Saka Indonesia Pangkah Ltd. in upstream oil and gas facilities either to boost hydrocarbon products to downstream facilities or to lift liquid hydrocarbon as a common artificial method. As production rate declining leads to gas supply deficiency to the compressors, the operating point move to surge line away from the best efficiency point. Gas feed shortage affecting the compressor's performance which contributed to head and flow capacity. This condition is then calculated and simulated using UNISIM Design Simulator to get optimum configuration results. The simulation was performed at the same gas turbine shaft power output of each compressor. Two cases of centrifugal compressors configuration with different functions and performance are studied. Due to process dynamic conditions, constraint parameter is considered as per desired operating point. This paper also analyses techno-economic aspects between individual and serial pipelines arrangement of the two compressors by evaluating operational data and design calculation. Subsequently, this study produces assessment observations associated with the compressor performance both in individual and serial configuration and eventually analyses the rate of fuel consumption in the gas turbines as the main driver. The case study shows serial arrangement between MPC-1 and GLC with same gas turbine shaft power as individual configuration can reduce fuel consumption up to 47 kg/hr. It saves as much as USD 7,569.96 per day at low demand and USD 7,569.96 at high-demand cases.

Stripping is a process to separate dissolved gas in the saturated solvent to regenerate the absorption solvent. In this study, N₂ gas was used to strip dissolved CO₂ gas in MDEA, ethylene glycol, and water. The experiment was conducted with three variations of temperature, namely 28°C, 35°C, and 50°C, to determine the effect of solvent's temperature entering the stripper column on the value of the mass transfer coefficient (Kla). The stripper effluent was connected to the KANE 457 Flue Gas Analyzer to measure the concentration of CO₂. Data retrievals were carried out at the 0; 30; 60; 90; 120; 150; 180th second. The experimental results show the trend of mass transfer coefficient of CO₂ (Kla) is higher with the increase of solvent's temperature entering the stripper.

Air Conditioning are major contributors to energy consumption in-suite room Santika Hotel Yogyakarta. A suite room is a choice of rooms with the best facilities compared to other rooms, so comfort is one of the services that must be optimized. The ain is to determine the conduction heat load of various components in the room. Heat conduction load calculation includes heat load through the glass on the east 1253.18 BTU/hr, conduction heat load through the wall to the south 606.14 BTU/hr, solar radiation through glass 1268.48 BTU/hr, heat gain from people 1980 BTU/hr, electrical equipment/lights 2193 BTU/hr and heat gain from ventilation 13053.6 BTU/hr. The total amount of heat gain used in exergy analysis calculation with a value of 3053.16 BTU/hr.

Electric vehicle (EV) becomes an important option to overcome limited resources of fossil energy resources and to reduce side effects of Internal Combustion Engine Vehicles (ICEV) on the environment and health. However, the implementation policy of EV needs to apply carefully to make this policy sustainable and to minimize its side effects. Therefore, the Government of a country plays a significant role in leading and support the implementation of EV with policy and regulation. This paper reviews policies of Electric Vehicles (EV) in South Korea and Indonesia. The main objective of this review is to evaluate the strengths and weaknesses of the policies implemented in those countries. Three main aspects are elaborated, i.e., the main policy, the technology, and the private sector implementations. This paper also develops recommended policies and actions that could be done in Indonesia by reflecting on the EV policy in South Korea.

One solution for diminishing carbon outflows is to provide electric vehicles (EV), which can help the sustainable development of the ecosystem in an environmentally way. Jakarta, as a capital city with high levels of pollution, has forced the government to recognize the need for policymakers to correct environmental failures through effective policy solutions. To support policy-driven adoption of EV, incentives shall be given to stimulate EV users. Current regulations have not yet explained regulations for EV's, direct and indirect consumer benefits, infrastructure for charging, and complementary policies. This paper will compare the world's best EV policy which will determine the main policy criteria to be developed for Jakarta's regulation using the analytical hierarchy process and entropy method in giving scaled preferences of sets of standards and alternatives with acceptable inconsistency. AHP is used to determine initial subjective weights from experts, while then entropy will enhance AHP's weights into objective weight. This study shows that charging infrastructure is the most influential criterion among other criteria followed by consumer incentive, both direct and indirect, complimentary policies, and regulatory incentives. Therefore, it is highly recommended that Jakarta's government develop EV's incentive policy in detail as the order above.

There are many methods to improve the characteristics of permanent magnet motors. One of them is by making flux barriers on the stator or rotor, or both. This paper discusses the adding stator flux barriers on the rectangular-shaped stator of the interior permanent magnet motor. The purpose is to increase the maximum rotation of the machine. The shape of the flux barrier is circular considering the ease of the manufacturing process, with the proposed diameter is one slot pitch. Several diameters of larger and smaller sizes will also be simulated for comparison. Other parameters, which are cogging torque and stator core loss, are also investigated. Design and simulation are carried out analytically and numerically using 2D finite element analysis. The simulation results indicate that the proposed flux barrier diameter can provide the maximum rotation with only a tiny decrease in output torque. In this regard, it can be concluded that the stator flux barriers affect the speed than output torque. Additional advantages are also obtained from the decrease in cogging torque and core loss at the base speed compared to a stator without flux barriers.